Zeitschrift für Physik D Atoms, Molecules and Clusters

ISSN: 0178-7683 (printed version)
ISSN: 1431-5866 (electronic version)

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Abstract Volume 39 Issue 1 (1997) pp 35-40

Simulation of isotopic selectivities and isotope ratio enhancement factors for gadolinium and lanthanum using narrow band laser excitation

M. V. Suryanarayana, M. Sankari

National Centre for Compositional Characterisation of Materials, ECIL(PO), Hyderabad-500 062, India

Received: 13 May 1996 / Final version: 13 August 1996

Abstract. Isotopic selectivities and isotope ratio enhancement factors have been calculated for 4f⁷5d6s^{2 9}D^o₅ - 4f⁷5d6s6p ⁹D₆ (585.622 nm) transition of gadolinium and for 5d6s^{2 2}D_3/2 - 5d6s6p ⁴F^o_3/2 (753.9 nm) transition of lanthanum by simulating the spectra assuming natural isotopic abundance of the samples. The atomic line shapes are assumed to be Lorentzian. Isotopic selectivities and isotope ratio enhancement factors for single step excitations have been computed. The isotope ratio enhancement factors estimated by us are half the value obtained by Young. et al. This is because the isotope ratio enhancement obtained by them is for a two colour RIMS where as our computations for selectivities are for a single step excitation. Considering the statistical error in the experimental values, our estimated isotopic selectivities are in good agreement with the available experimental data.

PACS : 32.20; 32.70; 35.10

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